Data not being displayed in a listview from SQLite in android

I have successfully created a database and inserted data into it.However when retrieving the data and displaying it in a listview ,the data is not being displayed.I am unsure as to where my problem lies.I have researched in S/O and other tutorials but cannot seem to find what suits my code.The following is what i have tried:

DBHelper.java which extends SQLiteOpenHelper

public class DBHelper extends SQLiteOpenHelper {

    public static final String DATABASE_NAME = "MyDBName.db";
    public static final String CONTACTS_TABLE_NAME = "contacts";
    public static final String CONTACTS_COLUMN_ID = "id";
    public static final String CONTACTS_COLUMN_NAME = "name";
    public static final String CONTACTS_COLUMN_EMAIL = "email";
    public static final String CONTACTS_COLUMN_PHONE = "phone";

    private HashMap hp;

    public DBHelper(Context context)
    {
        super(context, DATABASE_NAME , null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        // TODO Auto-generated method stub
        db.execSQL(
                "create table contacts " +
                        "(id integer primary key, title text,phone text,email text)"
        );
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // TODO Auto-generated method stub
        db.execSQL("DROP TABLE IF EXISTS contacts");
        onCreate(db);
    }

    public boolean insertContact  (String name, String phone, String email)
    {
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues contentValues = new ContentValues();

        contentValues.put("title", name);
        contentValues.put("amount", phone);
        contentValues.put("description", email);


        db.insert("contacts", null, contentValues);
        return true;
    }
    public Cursor getData(int id){
        SQLiteDatabase db = this.getReadableDatabase();
        Cursor res =  db.rawQuery( "select * from contacts where id="+id+"", null );
        return res;
    }
    public int numberOfRows(){
        SQLiteDatabase db = this.getReadableDatabase();
        int numRows = (int) DatabaseUtils.queryNumEntries(db, CONTACTS_TABLE_NAME);
        return numRows;
    }
    public boolean updateContact (Integer id, String name, String phone, String email)
    {
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues contentValues = new ContentValues();
        contentValues.put("title", name);
        contentValues.put("amount", phone);
        contentValues.put("description", email);

        db.update("contacts", contentValues, "id = ? ", new String[] { Integer.toString(id) } );
        return true;
    }

    public Integer deleteContact (Integer id)
    {
        SQLiteDatabase db = this.getWritableDatabase();
        return db.delete("contacts",
                "id = ? ",
                new String[] { Integer.toString(id) });
    }
    public ArrayList getAllContacts()
    {
        ArrayList array_list = new ArrayList();
        //hp = new HashMap();
        SQLiteDatabase db = this.getReadableDatabase();
        Cursor res =  db.rawQuery( "select * from contacts", null );
        res.moveToFirst();
        while(res.isAfterLast() == false){
            array_list.add(res.getString(res.getColumnIndex(CONTACTS_COLUMN_NAME)));
            res.moveToNext();
        }
        return array_list;
    }
}

In Details.java where i insert the data on button click this way:

public void run(View view) {
        Bundle extras = getIntent().getExtras();
        if (extras != null) {
            int Value = extras.getInt("id");
            if (Value > 0) {
                if (mydb.updateContact(id_To_Update, title.getText().toString(), amount.getText().toString(), description.getText().toString())) {
                    Toast.makeText(getApplicationContext(), "Updated", Toast.LENGTH_SHORT).show();
                    Intent intent = new Intent(getApplicationContext(), MyBasket.class);
                    startActivity(intent);
                } else {
                    Toast.makeText(getApplicationContext(), "Not Updated", Toast.LENGTH_SHORT).show();
                }
            } else {
                if (mydb.insertContact(title.getText().toString(), amount.getText().toString(), description.getText().toString())) {
                    showAlertDialog();
                } else {
                    Toast.makeText(getApplicationContext(), "not done", Toast.LENGTH_SHORT).show();
                }

            }
        }
    }

MyBasket.java is where i display the listview of the data added this way: in my OnCreate()

mydb = new DBHelper(this);

        ArrayList array_list = mydb.getAllContacts();

        ArrayAdapter arrayAdapter =
                new ArrayAdapter(this,android.R.layout.simple_list_item_1, array_list);

        //adding it to the list view.
        obj = (ListView)findViewById(R.id.listView1);
        obj.setAdapter(arrayAdapter);

Still i am unable to display.I dont know where i am going wrong.Any help or suggestions will be much apprecated.